Plzz ! maths !
me with question 5. i have no idea how to work it out.

To complete this chart, all you have to do is replace the numbers in the "x" column with the variable "x" in the expressions. Here's what I mean.

For the problem "13-x", replace "x" with the 2. Replace the x with the 2 for the rest of the problems. Then repeat the substitution method (chart is attached so you can see what I mean) with the numbers 4, 6, 8, 10, and 12.

final answer is : )

goog may have it for you